It’s a bad sign for Mitt Romney when conservatives begin to question why the presumptive Republican nominee won’t release more of his tax returns. But on Sunday, that’s what happened. Conservative analysts joined Democrats in wondering whether Romney is just being impolitic in not releasing several years worth of returns — or whether he’s trying to hide something.

Democrats have been calling on Mitt Romney to release more than one year of his tax returns with a series of web videos and public statements. So far, he has released his 2010 returns and an estimate of his 2011 returns.

To politicos across the ideological spectrum, Romney’s unwillingness to release anything beyond these two years raises the question: if it’s worth the bad press to keep the tax returns private, they must contain something worse. “The cost of not releasing the returns are clear,” said conservative columnist George Will, on ABC’s “This Week.” “Therefore, he must have calculated that there are higher costs in releasing them.”